# RLM vs PiSquared

The clearest difference is price: RLM at Free against PiSquared's $1.99. RLM also leads on update cadence (every 4 weeks vs every 23 months). PiSquared's advantage is in-app purchases (none vs 4) and iOS requirement (13.0 vs 26.0). On ads and device support there is nothing between them.

RLM is free to download; PiSquared costs $1.99 up front. RLM sells 4 in-app purchases, starting at $0.49 per month. PiSquared asks for nothing beyond the download.

RLM ships an update every 4 weeks, PiSquared every 23 months. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | RLM | PiSquared |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/rlm-19bx/id1597086394/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 23 months |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 3 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [R.L.M. Software](https://appshunter.io/developer/289639238) | [Hartwig Wiesmann](https://appshunter.io/developer/1658877258) |

## What reviewers say

### RLM

[App page](https://appshunter.io/ios/app/rlm-19bx/id1597086394)

This app offers a comprehensive suite of financial, business, scientific, and statistical calculators. It includes specialized worksheets for loan amortization, bond pricing, currency exchange, probability distributions, and complex number operations. Users can also perform date and time calculations, solve arbitrary equations, and convert units.

**Highlights:** Finance worksheets (amortization, bonds, options), Business tools (bill split, break-even, currency), Statistical analysis (probability, regressions), Scientific functions (complex numbers, vectors), Unit and currency conversions, Equation solver, Date and time calculations

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.49 | per month |
| Semi-Annual Subscription | $2.99 | per 6 months |
| Annual Subscription | $5.99 | per year |
| Lifetime Purchase | $9.99 | one-time |


### PiSquared

[App page](https://appshunter.io/ios/app/pisquared/id1615268645)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is RLM free?

RLM is free to download, with in-app purchases available.

### Is PiSquared free?

PiSquared costs $1.99, with no in-app purchases.

### Do RLM or PiSquared have ads?

Neither RLM nor PiSquared shows ads.

### Which is updated more often, RLM or PiSquared?

RLM ships an update every 4 weeks, and PiSquared every 23 months. Most recently, RLM was updated on October 24, 2026 and PiSquared on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*